What do the numbers and letters in the cup stand for?

The letters on the bra specifications refer to the cups, and the numbers refer to the size of the lower bust. For example, if the bra size is 70A, it means that the lower bust is 70cm and the cup is A-shaped (that is, the difference between the upper bust and the lower bust is about 10cm).

The calculation formula of cup is: cup size = upper bust size-lower bust size. Generally, cups are represented by capitalized English letters such as A, B and C, and are graded every 2.5cm, where AA is 7.5cm, A is 120cm, B is 12.5cm, C is 15cm, D is 17.5cm, and E is 20.

When buying a bra, it is often necessary to choose a similar approximate figure according to the lower bust as the size of your bra. For example, if the lower bust is between 68 cm and 72 cm, you should choose 70 yards, and then choose the appropriate cup according to the difference between the upper and lower busts.

Extended data

Choose different bra cup shapes;

1/2 Cup Bra The shoulder straps of this bra can usually be taken off to become strapless underwear, which can be matched with strapless clothing.

3/4 cup bra has strong concentration and good gathering effect, which effectively highlights the breast curve.

Full-cup bra completely wraps the chest to prevent sagging and expansion of the chest, which is suitable for any chest type.

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Baidu encyclopedia-bra size comparison table